Living the Dream: A Documentary Study of Twin Oaks Community by Ingrid Komar (1983; 408 pages; paperbound) is in print, available from The Fellowship for Intentional Community. Written in cooperation with the members of Twin Oaks, this book covers everything from decision making and economics to interpersonal relationships.

A Walden Two Experiment: The First Five Years of Twin Oaks Community by Kathleen Kinkade is out of print. It can sometimes be found at used book outlets.